Jaeyoon is the lead vocalist of SF9 which is under FNC Entertainment. His real name is Lee Jae Yoon.
He is 27 years old. His horoscope sign is Leo and his date of birth falls on 9 August 1994.
He is 183 cm tall in height and his weight is 66 kg. He has the blood type O.
He is from Busan, South Korea.